This paper introduces the component and the operation principle of the jammer using DRFM,and analyzes the emergence of frequency spot error and spurious signal,and their influence on the jamming noise.
介绍了DRFM干扰机的组成和工作原理,并分析了瞄频误差和寄生信号的产生以及它们对干扰噪声的影响。
Aimed at the effect which the spurious signal of phase quantization DRFM has on the design of jammers,the spurious signal power variation on the condition of different quantized bits is analyzed to provide DRFM analysis and design with a reference.
针对相位量化数字储频寄生信号对干扰机中数字储频设计的影响,分析了量化比特数不同时寄生信号的功率变化,为数字储频的分析和设计提供一个参考。
Are postcards cheaper to send than a letter ?
寄明信片比寄信便宜吗？
Oh dear! I forgot to post the letter.
哎呀!我忘了寄信。
Hello, may I help you, sir?
先生，你要寄信吗? ?
I'd like to mail this letter to China by certified mail.
我想把这封信按保寄信寄到中国去。
send a letter, telegram, message, etc
寄信、 发电报、 传送信息
And offer to send letters to people who are not collecting stamps.
主动给那些不集邮的人寄寄信。
You can't send a letter overseas by certified mail. If you want, you can register it.
海外信件不能寄保寄。如果愿意，你可以寄挂号信。
How would you send this letter, by air mail or regular mail?
这封信你怎么个寄法，是航空邮寄还是寄平信？
The information is sent in a sealed envelope.
信息用封口的信封寄出。
Do you want to send it as an ordinary or registered letter.
您想寄平信还是挂号信？
Do you want to send it as ordinary or registered letter?
寄平信还是挂号信？
I surely believe I send out that letter.
我确信我寄出了那封信。
Do you want to send it by air mail or by ordinary mail?
你想寄平信还是寄航空邮件？
It's2yuan by surface mail and3.6yuan by air.
寄平信2元，寄航空要3元6角。
I'm sending the letter today; the packet will follow (later).
我今天寄这封信，包裹随后再寄。
I promise I'll remember to post your letter.
我一定记得寄你的信。
You'd better send the letter by air.
这封信你最好寄航空。
We sent the letter by airmail.
我们寄了封航空信。